Structure of heat exchange pipe

ABSTRACT

A structure of the heat exchange pipe is provided for conducting heat generated by combustion inside a burner to the outside. The structure of the heat exchange pipe includes a receptacle and an insertion. The insertion is disposed in the receptacle. The insertion includes at least three petals, each of which includes a first circular arc section and a second circular arc section. The first circular arc section extends toward a center of the receptacle and has a first arc angle. The second circular arc section has a second arc angle. The second arc section is arranged between two first circular arc sections of two adjacent ones of the petals. The first and second circular arc sections define a flue. As such, the insertion forms a flue baffle device.

(A) TECHNICAL FIELD OF THE INVENTION

The present invention relates to a structure of a heat exchange pipe in the technical field of heat exchangers, and more particular to one that forms a flue baffle device to help improve heat/cold exchange rate and to better the structure and improve physical property thereof.

(B) DESCRIPTION OF THE PRIOR ART

A conventional structure of a heat exchange pipe comprises an internal insertion and an external receptacle. The receptacle receives and holds the internal insertion therein. The insertion comprises two semicircular sectorial segments that are coupled to each other and disposed in the external container. The two semicircular sectorial segments each have a semicircular cross section.

Such a conventional heat exchange pipe suffers an issue of reduction of heat exchange rate and thus, maximization of the surface area of the insertion is necessary in order to establish contact with combustion gas of a burner with such a maximized surface area.

To cope with such a problem, Taiwan Patent Application No. 103119444, which is owned by the present applicant, discloses a heat exchange pipe. The heat exchange pipe has a structure that comprises an insertion, which is formed by folding three or more sectorial segments and is formed of extrusions of aluminum; and a receptacle, which is arranged to receive and hold therein the insertion such that an internal circumferential surface thereof is in contact engagement with an outer circumferential surface of the insertion. Contact with a burner can be improved by enlarging, in a maximized manner, a surface area of the insertion that is disposed in a heat exchange pipe so that when for example a burner of a boiler is in operation, transmission of heat generated by combustion to the outside of the heat exchange pipe can be enhanced.

Thus, it is desired in this field to provide a heat exchange pipe that demonstrates improved heat/cold exchange rate and has a bettered structure and enhanced physical property.

The present invention is made to overcome such problems.

SUMMARY OF THE INVENTION

An objective of the present invention is to provide a structure of a heat exchange pipe that comprises an insertion that comprises a plurality of petals and a plurality of circular arc sections to form a flue baffle device to improve heat/cold exchange rate and to better the structure and improve physical property thereof.

To achieve the above objective, the present invention provides a structure of a heat exchange pipe that conducts heat generated by combustion inside a burner to the outside. The structure of the heat exchange pipe comprises a receptacle and an insertion, wherein the insertion is disposed in the receptacle and the insertion comprises at least three petals. The petals each comprise a first circular arc section and a second circular arc section. The first circular arc section extends toward a center of the receptacle and has a first arc angle. The second circular arc section has a second arc angle. The second arc section is arranged between two first circular arc sections of two adjacent ones of the petals. The first and second circular arc sections define a flue.

In this way, the insertion forms a flue baffle device.

Beneficial advantages that the present invention may provide are as follows:

(1) The three petals forms a flue in a radiating form so that through conduction in a radiating manner, an effect of stable heat/cold exchange can be achieved.

(2) The first circular arc section is made in the form having an arch like configuration, making the structure relatively stiff so as to better the resistance against deformation resulting from thermal stresses.

(3) The second circular arc section is arranged between two first circular arc sections to provide an effect of dividing a flow so as to improve heat/cold exchange rate.

(4) The receptacle and the insertion provide a combination of different materials so as to improve utilization thereof.

The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.

Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of the present invention.

FIG. 2 is a top plan view showing a structure of an insertion of the present invention.

FIG. 3 is a top plan view of a petal of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

Referring to the illustrations of FIGS. 1, 2, and 3, the present invention provides a structure of a heat exchange pipe, which conducts and dissipates heat generated by combustion inside a burner to the outside. In a preferred embodiment, the structure of the heat exchange pipe comprises a receptacle 10 and an insertion 20. A detailed description will be given below.

The insertion 20 is disposed in the receptacle 10. The insertion 20 comprises at least three petals 21, and the petals 21 each comprise a first circular arc section 211 and a second circular arc section 212. The first circular arc section 211 extends toward a center of the receptacle 10 and has a first arc angle. The second circular arc section 212 has a second arc angle. The second circular arc section 212 is arranged between two first circular arc sections 211 of two adjacent ones of the petals 21. The first circular arc section 211 and the second circular arc section 212 define a flue or a duct 30.

In a structure of one embodiment, the insertion 20 is formed of three sectorial petals 21 and each of the sectorial petals 21 has a central angle of 120°.

In a structure of one embodiment, each of the second circular arc sections 212 of the insertion 120 extends from the corresponding first circular arc section 211 to positively maximize a surface area of the insertion 20 so that the expanded surface area provides contact with combustion gas of a burner and makes the structure relatively stiff to better the resistance against deformation resulting from thermal stresses and to provide an effect of dividing a flow.

In a structure of one embodiment, the first arc angle is greater than the second arc angle.

In a structure of one embodiment, the petals 21 of the insertion 20 each comprise a third circular arc section 213 and the third circular arc section 213 has a third arc angle in order to positively maximize a surface area of the insertion 20 so that the expanded surface area provides contact with combustion gas of a burner and makes the structure relatively stiff to better the resistance against deformation resulting from thermal stresses and to provide an effect of dividing a flow.

In a structure of one embodiment, the receptacle 10 and the insertion 20 are a combined structure of different materials to improve the utilization thereof. For example, the receptacle 10 may comprises stainless steel and the insertion 20 comprises a non-ferrous metal material, such as a copper alloy or an aluminum alloy.

Referring to the illustrations of FIGS. 1 and 2, in a structure of one embodiment, the petals 21 of the insertion 20, before being disposed and mounted in the receptacle 10, are separate from one another and after the petals 21 are disposed and mounted in the receptacle 10, opposing sides of the petals 21 engage and mate each other to form abutting engagement therebetween.

In a structure of one embodiment, the petals 21 of the insertion 20 are formed through extrusion to be in a connected arrangement that forms a unitary body so that after the insertion 20 is folded, the insertion 20 is receivable and mounted in the receptacle 10.

The above provides a description to the components of the present invention and assembly thereof. In the following, a practical example, features, and advantages of the present invention will be described.

Referring to the illustration of FIG. 1, the insertion 20 can be used to constitute a flue baffle device.

Beneficial advantages that the present invention may provide are as follows:

(1) The three petals 21 forms a flue in a radiating form so that through conduction in a radiating manner, an effect of stable heat/cold exchange can be achieved.

(2) The first circular arc section 211 is made in the form having an arch like configuration, making the structure relatively stiff so as to better the resistance against deformation resulting from thermal stresses.

(3) The second circular arc section 212 is arranged between two first circular arc sections 211 to provide an effect of dividing a flow so as to improve heat/cold exchange rate.

(4) The receptacle 10 and the insertion 20 provide a combination of different materials so as to improve utilization thereof.

It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention. 

I claim:
 1. A structure of a heat exchange pipe, which is adapted to conduct heat generated through combustion inside a burner to the outside, the structure of the heat exchange pipe comprising: a receptacle; and an insertion, which is disposed in the receptacle, the insertion comprising at least three petals, the petals each comprising a first circular arc section and a second circular arc section, the first circular arc section extending toward a center of the receptacle and having a first arc angle, the second circular arc section having a second arc angle, the second circular arc section being arranged between two first circular arc sections of two adjacent ones of the petals, the first circular arc section and the second circular arc section defining a flue.
 2. The structure of the heat exchange pipe according to claim 1, wherein the insertion is formed of three sectorial petals and each of the sectorial petals has a central angle of 120°.
 3. The structure of the heat exchange pipe according to claim 1, wherein the second circular arc sections of the insertion extend from the first circular arc sections respectively.
 4. The structure of the heat exchange pipe according to claim 1, wherein the first arc angle is greater than the second arc angle.
 5. The structure of the heat exchange pipe according to claim 1, wherein the petals of the insertion each comprise a third circular arc section and the third circular arc section has a third arc angle.
 6. The structure of the heat exchange pipe according to claim 1, wherein the receptacle and the insertion form a combination of different materials.
 7. The structure of the heat exchange pipe according to claim 6, wherein the receptacle comprises stainless steel and the insertion comprises a non-ferrous metal material.
 8. The structure of the heat exchange pipe according to claim 1, wherein the petals of the insertion are separate from each other before being disposed in the receptacle and two opposing sides of the petals engage each other to form abutting engagement therebetween after the petals are disposed in the receptacle.
 9. The structure of the heat exchange pipe according to claim 1, wherein the petals of the insertion are formed through extrusion to be in a connected arrangement that forms a unitary body so that after the insertion is folded, the insertion is receivable and mounted in the receptacle. 